Sites like athelu.com

Chibbin Grove is a shop and blog of fantasy and sci-fi battle maps and tabletop RPG assets, with free downloads and a dice roller

A wiki and blog by Derek "DFreds" covering documentation, updates and news for his FoundryVTT modules for tabletop games

3 Death Saves: a studio publishing Foundry VTT modules for tabletop roleplaying, plus homebrew material for its world, The Last Gyre

Unfolding Machines is a blog by Jean Sensaar about PUM Companion, its solo tabletop roleplaying game apps and related tools

Adventure writing and tabletop RPG content by narrative designer Konstantinos "Kelfecil" Christakis, including the Starlight Arcana setting and maps

Angela Maps: free static and animated battle maps for D&D and other tabletop RPGs, by Angela

Stephen Garrett's Wellington GM site offers tabletop RPG adventures, maps, and campaign tools for Game Masters, built on Foundry VTT

Dungeon Channel, a site of free tabletop RPG maps, dungeon tiles and campaign tools for Dungeon Masters and players

A day at: a creator's shop of battlemaps, modular rooms and asset packs for post-apocalyptic and cyberpunk tabletop games

AbyssalBrews: a catalogue of weekly illustrated magic items and add-on systems for D&D and Pathfinder 2E tables by Fernando and Matthew

Moonlight Maps is a shop selling fantasy, sci-fi and cyberpunk battle maps for tabletop roleplaying, started by Ollie in 2020

Spooky Action Games sells digital and printed TTRPG battle maps and 5E adventures, created by Angela in Finland

Legacies of the Dragon is a site offering a 3.5E SRD game module for Foundry VTT, with adventure companions and a Patreon-linked add-on

TheRipper93 is a website by a developer making Foundry VTT modules for tabletop games, with module pages, maps and help

A third-party publisher of tabletop roleplaying game supplements, including the Sinclair's Almanac and Codex rulebooks for Pathfinder and 5E

Venger's Decks, a store selling tabletop RPG card decks, battle mats, maps and packs, plus free party character sheets

Mammoth Factory Games, a tabletop gaming company making D&D 5e adventures, 3D-printable miniatures and STL files, including the Fateless fairytale expansion

A dungeon and cave map generator for virtual tabletop games, with automatic dynamic lighting tools, by its developer DunGen

JB2A is a source of animated spell and effect assets for the FoundryVTT virtual tabletop, with a library viewer and downloads

Tab Creations, a Kansas publisher of historical and hobby games, including roleplaying games, card games and board games, with a TabBlog

Moulinette is a search engine for tabletop gamemasters to find tiles, images, maps and sceneries for game prep

Tom Cartos is a site selling and sharing TTRPG battlemaps, tokens, assets and adventures, with a shop for books and accessories

Cthulhu Architect is a shop selling horror tabletop RPG maps and digital assets for Cthulhu Mythos games, Foundry VTT and Dungeondraft

Miska's Maps is an online shop selling sci-fi and fantasy battlemaps, spaceship deckplans and Foundry VTT modules for tabletop RPGs

Caesar Ink is a design and consultancy company offering game design, illustration, layout and business advice for ideas

Independent tabletop RPG studio Fables Monster Studio making horror and sci-fi scenarios, VTT modules and playable artifacts

Forgotten Adventures, a site selling tabletop RPG battlemaps, map assets and tokens, with a Clip Studio Paint mapmaking guide

A web tool for creating and advancing Shadowrun 6 characters, with a searchable index of rules data and a development blog

Liminal Horror, a rules-lite survival horror tabletop roleplaying game with its system reference, licenses, clue-writing guides and print catalogue

Michael Ghelfi Studios sells licensed tabletop RPG music and sound effects libraries, plus free game-master tools and a blog

Limithron, a blog-style showcase of pirate-themed RPG maps and illustrations for Pirate Borg, by the artist behind it

MCDM Productions, a company making tabletop RPG games and rulebooks such as Fortune or Death Crows, with its founder's story

Caeora's site offers... no, forbidden. Here is the sentence:

A digital dice-rolling app for tabletop roleplaying games, with 3D custom dice themes that work across virtual tabletop platforms

The Dungeon Coach is a store and blog of tabletop RPG PDFs, supplements and the DC20 system for Dungeons & Dragons players

Runehammer Games, a tabletop RPG publisher and play room run by Brandish Gilhelm, with fantasy and sci-fi adventures, dice and miniatures

Fate SRD, a website of articles, tabletop RPG rules and game products for the Fate roleplaying system

Arc Dream Publishing, a small publisher of tabletop role-playing games including Delta Green, The Black Company and Godlike

Sly Flourish, a blog and newsletter by Michael Shea offering tips on running tabletop roleplaying games

The demonweb, a personal homepage of retro internet culture, digital empire essays, and a real-time location finder tool

Online shop selling Triangle Agency and Haunted Table tabletop role-playing games, supplements, and fan zines, with shipping and translations